tell me, the u.s. government does have a rocket somewhere pointing up that can shoot one of these things out of the sky. >> well, the plan would be to -- if we went ahead with this, would be to build a spacecraft to go up into space and knock the thing off course, just slightly, many years before it was near the earth. >> steve: hurry. just in case. all right. paul, research scientist near earth object program at nasa in l.a., paul, thank you very much. >> thank you. >> anna: 7:56. how well do you know your presidents? bet you don't know which one was also a bartender. we're about to put you to the test at the top of the hour. >> steve: then a guaranteed good night's sleep like a spa experience in your bedroom for under 15 bucks. you're not going to want to miss it while a body in motion tends to stay in motion. staying active can actually ease arthritis symptoms. but if you have arthritis, staying active can be difficult. prescription celebrex can help relieve arthritis pain so your body can stay in m